【摘要】 利用云南地区数字地震台站记录的云南及周边地区2000~2011年4.0级以上可同时测定近震震级M L和面波震级M S的433个地震波形数据,将速度数据进行仿真,即近震震级M L在仿真短周期地震仪DD-1记录上测定,面波震级M S在仿真中长周期地震仪SK记录上测定,对全部人工重新测定的M L和M S,采用线性回归和正交回归方法,得到了它们之间的转换关系式。结果表明,自20世纪70年代使用至今的公式M S=1.13M L-1.08与云南地区实际情况存在系统偏差,已不适用于云南地区。考虑到区域差异,认为采用关系式M S=1.13M L-0.86作为新的转换关系更合理适用。同时,对云南地震台网和国家地震台网都有记录的地震数据进行对比,发现云南台网和国家台网测定的绝大多数地震M L差值为-0.2~0.4,差值为0.2的地震数量最多;M S差值为-0.4~0.2,差值为-0.2的地震数量最多。更多还原

【Abstract】 Seismic station records of M ≥ 4. 0 earthquakes in the Yunnan Regional Digital Networks in 2000 ~ 2011 were used to determine near earthquake magnitude ML and wave magnitude MS of 433 earthquake waveform data. The speed data were simulated: near earthquake magnitude ML was simulated in terms of short cycle seismographs by DD-1 records,and surface wave magnitude M S in terms of the long cycle seismographs by SK records. All the ML and MS data were then man-checked with linear regression and orthogonal regression and obtain the conversion formula between them. Results showed that the formula MS = 1. 13ML- 1. 08 used since the 1970s may cause problems when applied to the Yunnan region. The adjusted formula of MS = 1. 13ML- 0. 86 is more applicable as the new conversion relationship. Meanwhile,the comparison between the recorded data from Yunnan seismic network and the national seismic network shows the M L difference of- 0. 2 ~ 0. 4 in most of these data with 0. 2 as the majority and M S difference between- 0. 4 ~ 0. 2 with- 0. 2 as the majority.更多还原